Cooling means for explosive-engines.



No. 657,45l. Painted Sept. 4, I900;

8.. W. REA.

COOLING MEANS FOR EXPLOSIVE ENGINES. (Applicaficn filed Apr. 14, 1900.

(No Model.)

. k? E e! I 2 a3 I m J I I ure .1 isasectional view of. an explosive-en- UNITED STATES,

PATENT CFFICE.

SAMUEL w. R-EA, OF RUSHVILLE, INDIANA.

COOLING MEANS FoFi EXPLOSIVE-ENGINESQ SJPEGIFIGATION forming part of Letters Patent No. 657,451, dated September 4, 1900.

Application filed April 14,1900,

To all whom it may concern/.1

Be it known that I, SAMUEL W. REA, a citizen of the United States of America, residing at Rushville, in the county of Bush and State of Indiana, have invented new and useful Improvements in Explosive-Engines,of which the following is a specification.

This invention is an improvement in explosive-engines; and the object of the invention is to provide for cooling the cylinder by circulating air around the. same within a jacket which envelops said cylinder.

In the operation of gas-engines and other explosive-engines the cylinder,or more especially the head thereof, forming the combustionchamber becomes greatly heated by the combustion'of the gases therein, and in order to overcome this heat such engines are usually provided with jackets surrounding the cylinder and forming passages for the circulation of water or other coolingmedium. The circulation ofwater around the cylinder forms an effective means for cooling the parts; but in some instances it is not desirable nor convenient to use water for this purpose, more especially in connection with portable engines and engines used in the propulsion of vehicles,and; a circulation of air istherefore'preferable. I

l have therefore devised a simple, cheap, and

effective means for keeping up a circulation of cool air around the cylinder by utilizing the exhaust from the engine to pump air into the inclosing jacket at one side and expel it out at the opposite side, to thereby provide a continuous current of cool air around the cylinder during the operation of the engine.

p In the following specification I have entered into a detail description ofmy inven tion, reference being had to the accompany: ing drawings and to letters thereon which designate the different parts and. what I claim as new, and desire toprotect by Letters Patent, is more specifically setforthfin the appended claim. In the drawings forming apart hereof, Figgine, illustrating only so muchfthereof as will show the application of myinventionry Fig. 2 is a view looking at theundersideof the inclosing jacket. @Fig. 3 a sectional view on the line 3 3 of Fig. .11. f

Referring to said drawings, A designates to permit a free passage of air. posite side of the jacket from the nozzle E Serial No. 12,910. on model.)

i ,thelcylinder of the engine, B the piston, and

O the exhaust-valve, these parts being of the construction usually employed in connection with gas-engines or other explosive-engines, and as my invention relates solely to the cooling of the cylinder I have not shown any igniting devices or valve-operating devices, but merely so much as to show the ap-' plication of my invention.

In carrying out-myinvention the cylinder A is inclosed by a sheet-iron jacket D, which is of such a size with respect to the cylinder as to leave a space between said cylinder and jacket. The jacket is supported from the cylinder by suitable brace-arms a, and as .said jacket is intended to only form passages for currents of air itmay be made of comparatively-thin sheet metal. An outlet-opening 6 is provided at one side of the jacket, said opening leading into a nozzle E, having a contracted portion 6, and into this nozzle projects the discharge. end of the exhaustvalve 0 of the engine, a space being left around the exhaust-valve, as shown, in order At the opthe said jacket is provided with an air-inlet opening f, formed by slitting the jacket 1ongitudinally and bendingthe edges in opposite directions. This opening is wider at the outer end or head of the cylinder in order that a greater-quantity of air willbe supplied to that part of the cylinder'which forms the combustion -'cha1nber for the gases. The

cylinder is provided with the usual webs at, extending around its circumference, while the outer end or head is formed with webs a extending across the same, These webs increase the area of surface against which the currents of air act andlfacilitate the cooling of the cylinder. j l p Duringthe operation of the engine the exjhau st or jet from the valve 0 passing through the nozzle B will cause a suction through said nozzle which will expel the air from the passages surrounding the cylinder, while cool; air will be drawn intothe j acketthrough the longitudinal opening f. (Asthe engine exhausts in .quicksuccession there will be an almost continuous current of air through the" opening f,.:around the head and sides of the cylinder, and outthroughthe nozzle,-and

this current of air vv'ill be sufficient to preven't '0 verheating of the cylinder; Itjw'ill therefore be seen that I provide a very efiective'means for cooling the cylinder of an explosive-engine andutilize the exhaust from the engine to keep'up a constant circulation, orv current 1 ofair aroundthe parts which are, liable *becom'e overheated. r

' In case the engine is located ina building an air-supply pipe maybe connected to the inlet-opening f in order to supply the jacket with airflow-without the-building l Having thus described my invention, I claim' as new-is 5 A Ina cooling device for explosiv i s the combination with 'the cylinder having webs around the sanie andacross-th'e end or head, and an exhaustwalve O projecting from one'side of said cylinder; of a jacket D iti'closiilg the cylinderjand having a tapered ,inletropening f extending longitudinally at one side thereof and formed by slitting the jacket and bending the edges back, the wider .partof the in1etopening being at the head of thecylinuer; and a hczile E projecting fromthe other sideof said jacket over the vaexhaust-nozz'le; and through which said exau'st nozzle discharges, substantially as shown and described. 7 v v In testimony whereoflaflix my signature 3o inpi'esence of two witnesses.

7' SAMUEL W RE Witnesses V a a. g e AlivaltwflrBitowlv, 

